What Cold Storage Monitoring Should Do

Cold storage monitoring tracks temperatures in each room, records the readings and alerts staff when a room drifts out of range. Good monitoring catches problems early and leaves a record that shows what happened.

The questions below help you judge whether a warehouse’s system meets your product’s needs.

Cold Storage Monitoring Sensors

Sensor placement shapes the readings. A sensor near the cooling unit may read colder than a pallet near the door or high in a rack. Ask where sensors sit and how many each room has.

Ask how often staff check sensor accuracy as well. A sensor that drifts can hide a real problem.

How Often Does It Record

Some systems record every few minutes, while others record less often. A long gap between readings can miss a short excursion. Ask the interval and whether you can get readings for your rooms and dates.

Alarms in Cold Storage Monitoring

• Who receives alarms during the day
• Who receives them at night and on weekends
• How fast staff must respond
• What staff do after an alarm

After all, alarms only help if someone acts on them. So ask for the written response procedure.

What Happens During an Outage

Even well run sites face power failures and equipment breakdowns. Ask whether the site has backup power for cooling and how long rooms hold temperature without it. Then ask how the warehouse would move product if a room failed.

Cold Storage Monitoring Records

Ask how long the warehouse keeps logs and how you can get them. For food, federal sanitary transportation rules in 21 CFR Part 1 Subpart O cover temperature duties in transport, and many owners want matching records from storage.

Make sure the records show the room, the date, the readings and any alarms with responses. The guide on cold chain records explains how storage logs fit with transport records.

Can You Add Your Own Loggers

In addition, some owners place their own data loggers on pallets. That shows the product’s experience rather than the room’s. Ask whether the warehouse allows it and how loggers get returned.

Putting the Answers Together

For example, a hypothetical frozen food brand comparing two warehouses might find one records readings far more often and sends alarms to a staffed desk around the clock. Those answers carry weight when the product is sensitive, because cold storage monitoring is the only early warning a room has. The article on temperature excursion events covers what to do when monitoring finds a problem.